A.determine the nature and extent of the information needed and access needed information effectively and efficiently.
B.evaluate information and its sources critically and incorporate selected information into his or her knowledge base and value system.
C.use information effectively to accomplish a specific purpose individually or as a member of a group.
D.understand many of the economic，legal，and social issues surrounding the use of information and access and use information ethically and legally.

A.增加用AND連接的檢索詞。
B.減少用OR連接的檢索詞。
C.選用下位主題詞檢索。
D.在原用副主題詞的基礎上，增加其它副主題詞來檢索。